EP 0429672 A4 19920108 - ACETAL COPOLYMER AND METHOD OF PRODUCING THE SAME
Title (en)
ACETAL COPOLYMER AND METHOD OF PRODUCING THE SAME
Publication
Application
Priority
- JP 9000792 W 19900618
- JP 6251490 A 19900315
- JP 6251590 A 19900315
- JP 15464789 A 19890619
- JP 20661989 A 19890811
- JP 34294189 A 19891229
Abstract (en)
[origin: EP0429672A1] An acetal copolymer having a viscosity number of 0.1 to 10 dl/g and an excellent isotropy and being constituted of a polyacetal unit and a particulate cross-linked polymer unit is produced by reacting a polyacetal particulate cross-linked polymer other than polyacetal, said polymer having mean particle diameter of 0.01 to 10 mu and functional groups selected from among hydroxyl, carboxyl, amino, amide, alkoxy, acid anhydride, and epoxy groups, to unite them with each other through said functional groups. Another acetal copolymer having a viscosity number of 0.1 to 10 dl/g and being constituted of a polyacetal unit and another polymer unit is produced by either homopolymerizing formaldehyde or trioxane or copolymerizing formaldehyde or trioxane with a cyclic ether in the presence of a polymer other than polyacetal, said polymer having a mean dispersion diameter of 0.01 to 2,000 mu and functional groups selected from among hydroxyl, carboxyl, amino, amide, alkoxy, acid anhydride, and epoxy groups, to unite the formed polyacetal with the polymer other than polyacetal through said functional groups.
IPC 1-7
IPC 8 full level
C08G 2/08 (2006.01); C08G 2/38 (2006.01); C08L 59/00 (2006.01); C08L 9/00 (2006.01); C08L 23/00 (2006.01); C08L 33/06 (2006.01); C08L 51/06 (2006.01); C08L 53/02 (2006.01); C08L 55/02 (2006.01)
CPC (source: EP US)
C08G 2/08 (2013.01 - EP US); C08G 2/38 (2013.01 - EP US); C08L 59/00 (2013.01 - EP US); C08L 9/00 (2013.01 - EP US); C08L 23/00 (2013.01 - EP US); C08L 33/06 (2013.01 - EP US); C08L 51/06 (2013.01 - EP US); C08L 53/02 (2013.01 - EP US); C08L 55/02 (2013.01 - EP US)
Citation (search report)
- WPI, FILE SUPPLIER, AN=76-06478X, Derwent Publications Ltd, London, GB; & JP-B-50 039 709 (DAICEL K.K.) 18-12-1975
- WPI, FILE SUPPLIER, AN=73-476934, Derwent Publications Ltd, London, GB; & JP-A-48 001 095, & JP-B-52 049 035 (DAICEL CO. et al.) 14-12-1977
- See references of WO 9015842A1
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0429672 A1 19910605; EP 0429672 A4 19920108; EP 0429672 B1 19960327; CA 2034505 A1 19901220; DE 69026205 D1 19960502; DE 69026205 T2 19961128; SG 82523 A1 20010821; US 5306769 A 19940426; WO 9015842 A1 19901227
DOCDB simple family (application)
EP 90909367 A 19900618; CA 2034505 A 19900618; DE 69026205 T 19900618; JP 9000792 W 19900618; SG 1996001245 A 19900618; US 65606291 A 19910219